BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Jesse Woods (University of Bern) DTSTART:20250919T070000Z DTEND:20250919T080000Z DTSTAMP:20260404T111108Z UID:EUPAC-TP/3 DESCRIPTION:Title: Defining QFT Categorically I\nby Jesse Woods (University of Be rn) as part of Europe and Pacific Theoretical Physics\n\n\nAbstract\nIn pr eparation to study Generalised (Categorical) Symmetries\, we provide motiv ation and give an introduction to some very basic\, but relevant\, concept s in Category Theory. We will introduce monoidal categories before showing that the expected properties of Topological Quantum Field Theory follow n aturally from a categorical definition. We compute some basic results of T QFT to demonstrate the utility of categories in physics.\n LOCATION:https://stable.researchseminars.org/talk/EUPAC-TP/3/ END:VEVENT BEGIN:VEVENT SUMMARY:Jonathan Skelton (University of Sydney) DTSTART:20250926T070000Z DTEND:20250926T080000Z DTSTAMP:20260404T111108Z UID:EUPAC-TP/5 DESCRIPTION:Title: Symmetries as Topological Operators\nby Jonathan Skelton (Univ ersity of Sydney) as part of Europe and Pacific Theoretical Physics\n\n\nA bstract\nIn this talk I'll discuss extended symmetry defect operators and how they naturally arise from symmetries in the quantum theory.\n\nThe foc us will be on ordinary symmetries\; these are referred to as 0-form topolo gical group-like symmetries in the modern literature. First I will discus s classical symmetries of Lagrangian field theory. In the second part I w ill discuss their analogues in the quantised theory\, and outline and a sk etch a proof of their properties.\n LOCATION:https://stable.researchseminars.org/talk/EUPAC-TP/5/ END:VEVENT BEGIN:VEVENT SUMMARY:Joey Faller (University of Queensland) DTSTART:20251003T070000Z DTEND:20251003T080000Z DTSTAMP:20260404T111108Z UID:EUPAC-TP/6 DESCRIPTION:Title: One-Form Symmetries and Confinement\nby Joey Faller (Universit y of Queensland) as part of Europe and Pacific Theoretical Physics\n\n\nAb stract\nGlobal symmetries\, traditionally understood to act on local opera tors\, are a cornerstone of QFT. This talk provides a pedagogical introduc tion to their generalisation: higher-form symmetries\; these act on non-lo cal\, extended operators like Wilson lines. We will begin by showing how t he concept of a conserved charge can be extended from 0-form to 1-form sym metries and demonstrate that this framework is consistent with Noether's t heorem.\n\nIn a gauge theory\, two principal types of 1-form symmetries ca n emerge: a 'magnetic' symmetry of topological origin from the Bianchi ide ntity ($dF=0$)\, and an 'electric' symmetry arising from the dynamical equ ations of motion. It is this electric 1-form symmetry that provides a nove l method to analyse confinement.\nThe primary application of this framewor k is to show how the status of this 1-form symmetry\, whether it is sponta neously broken or preserved\, precisely determines whether confinement is present or not.\n LOCATION:https://stable.researchseminars.org/talk/EUPAC-TP/6/ END:VEVENT BEGIN:VEVENT SUMMARY:Adèle Le Borgne (University of Bern) DTSTART:20251010T070000Z DTEND:20251010T080000Z DTSTAMP:20260404T111108Z UID:EUPAC-TP/7 DESCRIPTION:Title: Landau-Ginzburg theory for 1-form symmetries\nby Adèle Le Bor gne (University of Bern) as part of Europe and Pacific Theoretical Physics \n\n\nAbstract\nTo conclude the first block of seminars on higher form sym metry\, I will review the first four sections of $\\textbf{Mean string fie ld theory: Landau-Ginzburg theory for 1-form symmetries}$ by Nabil Iqbal\, John McGreevy.\n\n\n$\\textit{Abstract of the paper:}$ \n\nBy analogy wit h the Landau-Ginzburg theory of ordinary zero-form symmetries\, we introdu ce and develop a Landau-Ginzburg theory of one-form global symmetries\, wh ich we call mean string field theory. The basic dynamical variable is a st ring field – defined on the space of closed loops – that can be used t o describe the creation\, annihilation\, and condensation of effective str ings. Like its zero-form cousin\, the mean string field theory provides a useful picture of the phase diagram of broken and unbroken phases. We prov ide a transparent derivation of the area law for charged line operators in the unbroken phase and describe the dynamics of gapless Goldstone modes i n the broken phase. The framework also provides a theory of topological de fects of the broken phase and a description of the phase transition that s hould be valid above an upper critical dimension\, which we discuss. We al so discuss general consequences of emergent one-form symmetries at zero an d finite temperature.\n LOCATION:https://stable.researchseminars.org/talk/EUPAC-TP/7/ END:VEVENT BEGIN:VEVENT SUMMARY:Jonathan Skelton DTSTART:20251017T070000Z DTEND:20251017T080000Z DTSTAMP:20260404T111108Z UID:EUPAC-TP/8 DESCRIPTION:Title: Non-invertible Chiral Symmetry and the ABJ Anomaly\nby Jonatha n Skelton as part of Europe and Pacific Theoretical Physics\n\n\nAbstract\ nIn this talk I will derive the chiral (ABJ) anomaly\, and briefly outline its connection to non-invertible (generalised) symmetries.\n LOCATION:https://stable.researchseminars.org/talk/EUPAC-TP/8/ END:VEVENT BEGIN:VEVENT SUMMARY:Jesse Woods (University of Bern) DTSTART:20251024T070000Z DTEND:20251024T080000Z DTSTAMP:20260404T111108Z UID:EUPAC-TP/9 DESCRIPTION:Title: Degenerate Ground States\nby Jesse Woods (University of Bern) as part of Europe and Pacific Theoretical Physics\n\n\nAbstract\nDespite t heir common occurrence in our studies\, degenerate spectra are rare and sp ecial. In this talk\, we will briefly sketch the argument of eigenvalue re pulsion and explain why degenerate Hamiltonians are not the norm. We will also demonstrate how familiar mechanisms for degeneracy fail in Quantum Me chanics. Next\, anomalies will be discussed as an invariant for diagnosing degeneracy. To conclude\, we will discuss projective representations and how to realise anyon parastatics on the torus and the associated ground st ate degeneracy\, to set the scene for future discussions on fusion\, anoma lies\, and inflow.\n LOCATION:https://stable.researchseminars.org/talk/EUPAC-TP/9/ END:VEVENT BEGIN:VEVENT SUMMARY:Jesse Woods (University of Bern) DTSTART:20251031T080000Z DTEND:20251031T090000Z DTSTAMP:20260404T111108Z UID:EUPAC-TP/10 DESCRIPTION:Title: Anomalies and Inflow I\nby Jesse Woods (University of Bern) a s part of Europe and Pacific Theoretical Physics\n\n\nAbstract\nWe introdu ce anomalies as non-trivial fusions of symmetry defects. We introduce the inflow mechanism and the mapping torus.\n LOCATION:https://stable.researchseminars.org/talk/EUPAC-TP/10/ END:VEVENT BEGIN:VEVENT SUMMARY:Jonathan Skelton DTSTART:20251107T080000Z DTEND:20251107T093000Z DTSTAMP:20260404T111108Z UID:EUPAC-TP/11 DESCRIPTION:Title: Anomalies and Inflow II\nby Jonathan Skelton as part of Europ e and Pacific Theoretical Physics\n\nAbstract: TBA\n LOCATION:https://stable.researchseminars.org/talk/EUPAC-TP/11/ END:VEVENT BEGIN:VEVENT SUMMARY:Lukasz T. Stepien (University of the National Education Commission \, Krakow) DTSTART:20260327T080000Z DTEND:20260327T090000Z DTSTAMP:20260404T111108Z UID:EUPAC-TP/17 DESCRIPTION:Title: Bogomolny equations for some field-theoretical models\nby Luk asz T. Stepien (University of the National Education Commission\, Krakow) as part of Europe and Pacific Theoretical Physics\n\n\nAbstract\nThe Bogom olny equations\, if they can be derived for a given field-theoretical mode l\, give a valuable chance for seeking topologically stable soliton soluti ons for such model. I will present a method based on variational calculus\ , of deriving Bogomolny equations for some field-theoretical models\, and certain solutions of these equations\, too.\n LOCATION:https://stable.researchseminars.org/talk/EUPAC-TP/17/ END:VEVENT BEGIN:VEVENT SUMMARY:Bartosz Pyszkowski DTSTART:20260417T070000Z DTEND:20260417T080000Z DTSTAMP:20260404T111108Z UID:EUPAC-TP/20 DESCRIPTION:Title: An Introduction to Double String Theory and Non-Riemannian Backgr ounds\nby Bartosz Pyszkowski as part of Europe and Pacific Theoretical Physics\n\n\nAbstract\nThis talk introduces Double Field Theory (DFT) in the context of string theory\, with a focus on its application to "non-Rie mannian" backgrounds following arXiv:2008.03084. As a case study\, we cons ider a particular example in which the BRST cohomology simplifies\, contai ning only states at the first excited level. We then briefly examine the c onsistency of the theory by analyzing the modular invariance of the one-lo op torus partition function. To keep the discussion pedagogical\, a brief review of BRST quantization and modular invariance in string theory will b e provided. No prior familiarity with DFT is assumed\, and all are welcome .\n LOCATION:https://stable.researchseminars.org/talk/EUPAC-TP/20/ END:VEVENT END:VCALENDAR